<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01_CSS的三种位置</title>
    <link rel="stylesheet" href="01.css">
    <style>
        h4{
            background-color: yellow;
            color: black;
        }
        div{
            color: green;
        }
    </style>
</head>
<body>
<h4 style="color:blue">我是标题</h4>
<h4>我是标题</h4>
<h4>我是标题</h4>

<p>我是段落</p>
<p>我是段落</p>
<p>我是段落</p>
<p>我是段落</p>

<div>我是块级元素</div>
<div>我是块级元素</div>
<div>我是块级元素</div>
<div>我是块级元素</div>
</body>
</html>